Electrical heater.



C. C. POWERS.

ELECTRICAL HEATER. APP'LICATIQN FILED 1AN.25. 191s.

Patented July 23, 1918.

2 SHEETS-SHEET I.

IIIIIIIIIIIIIIIII-Z 2 vvvvv INVENTOR ATTORNEY-Q C. C. POWERS.

ELECTRICAL HEATER. APPLICATION FILED JAN. 25. l9l8. 1,273,666. Patentad Jul 23,1918;

2 SHEETS-SHEET 2.

INVENTOR ieaz'iw 6.20.106 my ATTQRNEYS UNITED OH'ARLESi C. POWERS, Q3

ELECTRICAL Mme.

Application filed January 25,

To all whom may concern:

Be it known that 1, CHARLES C. Pownns, a citizen of the United States, residing at Williams, in the county of Coconino and State of Arizona, have invented certain new and-useful Improvements in Electrical Heaters, of whichthe. following is a speci heating coil of wire is wound and preferably embedded in a heat insulating electrically non-conducting substance such as cement, bakelite, fire-clay or other suitable composition.

The heat isapplied to the fins, which may be either directly formed on the body to be ultimately heated, or formed as ears on hands that are strapped around or embrace the pipe or body which it is desired to heat.

The invention also includes those novel details of construction, combination and arrangenicrt of parts, all of which will he first fully described, then be specifically pointed out in the appended claims, and illustrated in the accompanying drawings, in which:

Figure l is a perspective view showing one form of the invention as applied to heat-- ing furnace pipes or other air ducts.

Fig. 2 is a cross section of the same.

Fig. 3 is a modification 9f the invention showing how the split band may be made in two parts, instead of one, as shown in Fig; 2.

Fig. 4 is a plan view of a modification in which the pipe has rod-like projections instead of flat elongated fins.

Fig. 5 is a cross section of a modification of the construction shown in Fig. 4, in which the lugs or projections are arranged radially around the pipe at intervals.

Fig. 6 is a perspective view showing the invention applied for heating rods.

Specification of I.

Fig. "Z is heating col mounted on in the dr numerals oi all of the which it is furnace pi the ends 2 and extend indicate like parts in 'esents the pipe 'acent to the e the o heating units and slipped nod by cotter pins 3, lind convenient,- y onto the tin, be wound on permanent onto or otherwise, or they may he as shown in l ig. the in, as sh. vn manner, as will o instead of to..- l re band in a single loop, may he mad sections, as shown in in which ev- 't a plurality oi fins. are provided to receiv. a j lui'ality of heat units.

Instead of providing the elongated structure, 5 indicated in i ns 2 of flat he made as pro c ions on t" 1 coil are located, as rannnatically indicated in l tion or heat rods which are used as heat concuctors, rowan; nent shown in Fig. 6 n and the coil receiving ugs may be formed inte ally with the eel r secured in a y l tlhe h nent structure, shoulders at the unit to l l ethod of amount of relatively preferably L 0 t (tacit lulu .nall roddike Wire; the layer can he laid close to the part be produced than in those cases Where the heating coil consists of a plurality of layers some of which must, of necessity, he remote from the point of heat concentration.

The coils '5 themselves may be made of insulated Wire or when hare Wire is used, they are Wound spaced apart and embedded in an insulating composition in such inanner as to prevent short-circuiting.

While l. have shown numerous modifications of my invention, is obvious that others may be made Without departing from the hivention or the scope of the appended claims and I desire it to be understood that I do not limit myself to the specific use of my ideas illustrated but desire it understood that the invention may he used Wherever it may be found adaptable.

From the foregoing description, taken in connection with the accompanying drawings, it is thought the complete construction, operation and advantages of the invention will be readily understood by those skilled in the art.

What I claim is:-

1. The combination of a body embracing heat-conducting band having ends, said heat conducting band having its ends bent to lie together to form a fin, a heating coil Wound invaeee on said fin, means to hold said coil on said fin and thereby hold said band ends together.

2. The combination of a body embracing heat-conducting band having ends, said heat conducting band having its ends bent to lie together to form a fin, a heating coil Wound on said fin, means to hold said coil on said fin and thereby hold said band ends together, and a non-fusible body embedding the coil.

3. The combination of a body embracing heat-conducting band having ends, said heat conducting band having its ends bent to lie together to form a fin, a heating coil Wound on said fin, and a non-fusible body einbedding the coil.

4:. A body having a radial heat conductive projection, a heating coil Wound on said projection and electrically insulated from the same, said coil being located in close proximity to the projection, a thin electrically insulated non-fusible covering over said projection on which said coil is Wound, and a heat insulating electrical non-conducting non-fusible covering over said coil and pro-- jection and of considerably greater thickness than the insulating covering between the coil and the projection, whereby the heat of the coil will be concentrated on the projection, all being arranged substantially as shown and for the purposes described.

CHARLES C. POWERS. 

